Please save yourself time, money and aggravation... do not use JustFly.com. I did. Was interrupted by agent and promised a lower rate and seating. Ended up with no seating and higher plane flight on wrong date and time. To change, there are more fees (not low). Even if their wrong doing. The next month we found additional miscellaneous fees on our card. Please do not use this site. It ended up costing almost 3 times the fee.
All connected bookings that had to occur from original mistakes and additional charges: 1)8/5/*******722; 2)8/5/*******722; 3)8/21/*******722; 4)9/2/*******4555; 5)9/2/*******4555; 6)10/2/*******4555; 7)10/8/*******4555 plus 2 8/3/19 $8 charges and a final $75 charge on 9/319.
Note: the actual airline attempted to correct and was blocked by JustFly.com.